A238889 - cp's OEIS frontend

A238889 Number T(n,k) of self-inverse permutations p on [n] where the maximal displacement of an element equals k: k = max_{i=1..n} |p(i)-i|; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	1
9	0
10	1
11	4
12	3
13	2
14	0
15	1
16	7
17	7
18	7
19	4
20	0
21	1
22	12
23	16
24	19
25	18
26	10
27	0
28	1
29	20
30	35
31	47
32	55
33	48
34	26
35	0
36	1
37	33
38	74
39	117
40	151
41	170
42	142
43	76
44	0
45	1
46	54
47	153
48	284
49	399
50	515
51	544
52	438
53	232
54	0
55	1
56	88
57	312
58	675
59	1061
60	1471
61	1826
62	1846
63	1452
64	764
65	0
66	1
67	143
68	629
69	1575
70	2792
71	4119
72	5651
73	6664
74	6494
75	5008
76	2620
77	0

[1, 1, 0, 1, 1, 0, 1, 2, 1, 0, 1, 4, 3, 2, 0, 1, 7, 7, 7, 4, 0, 1, 12, 16, 19, 18, 10, 0, 1, 20, 35, 47, 55, 48, 26, 0, 1, 33, 74, 117, 151, 170, 142, 76, 0, 1, 54, 153, 284, 399, 515, 544, 438, 232, 0, 1, 88, 312, 675, 1061, 1471, 1826, 1846, 1452, 764, 0, 1, 143, 629, 1575, 2792, 4119, 5651, 6664, 6494, 5008, 2620, 0]

cp's OEIS Frontend

A238889 Number T(n,k) of self-inverse permutations p on [n] where the maximal displacement of an element equals k: k = max_{i=1..n} |p(i)-i|; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Table of values

List of values